Spatially variant PMT cluster constitution and spatially variant

Details Spatially variant PMT cluster constitution and spatially variant Spatially variant PMT cluster constitution and spatially variant

1994-10-03

1996-04-16

Porta, David P.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

25036307, 36441324, G01T 120

Patent

active

055085245

ABSTRACT:
A system including circuitry within a gamma camera system for generating spatially variant photomultiplier cluster based on a peak photomultiplier and for generating spatially variant weights for photomultipliers of the cluster depending on a cluster type signal. The system includes a first memory circuit addressed by a peak photomultiplier address signal and responsive thereto which generates (1) a unique photomultiplier cluster in geometry and size for the peak photomultiplier and (2) a cluster type. A resolution input signal (high/low) changes the size of the cluster. The first memory is programmable. A second memory responsive to photomultiplier addresses of the cluster and the cluster type, generates weight values for each photomultiplier. The second memory is programmable. The second memory allows weights for individual photomultipliers to be altered based on the geometry and size (e.g., type) of the cluster generated by the first memory. The system can effectively operate within a digital gamma camera system.

REFERENCES:
patent: 4580055 (1986-04-01), Barfod
patent: 4675526 (1987-06-01), Rogers et al.

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